I have an Acer Aspire 3000 equiped with a Slimtype SOSW-833S. It didn't work for a while but i got the VRS3 firmware and it works perfectly but only at DVD's. It can't read or write CD's. What can I do about this? I searched all the web for a solution but didn't found an answer nowhere and i'm trying to fix it for two days now. I tried VRS4 also and the diference is that it was slower and the LED was blinking in yellow instead of green and still there was no change about the cd's. I tested if it is on DMA and it is. Can someone help me perhaps with an old firmware version?